// created by gpake
(function() {

    var config = {
        qiniuRegion: '',
        qiniuImageURLPrefix: '',
        qiniuUploadToken: '',
        qiniuUploadTokenURL: '',
        qiniuUploadTokenFunction: null,
    }
    
    module.exports = {
        init: init,
        upload: upload,
    }
    
    // 在整个程序生命周期中，只需要 init 一次即可
    // 如果需要变更参数，再调用 init 即可
    function init(options) {
        config = {
            qiniuRegion: '',
            qiniuImageURLPrefix: '',
            qiniuUploadToken: '',
            qiniuUploadTokenURL: '',
            qiniuUploadTokenFunction: null,
        };
        updateConfigWithOptions(options);
    }
    
    function updateConfigWithOptions(options) {
        if (options.region) {
            config.qiniuRegion = options.region;
        } 
        // else {
        //     console.error('qiniu uploader need your bucket region');
        // }
        if (options.uptoken) {
            config.qiniuUploadToken = options.uptoken;
        } else if (options.uptokenURL) {
            config.qiniuUploadTokenURL = options.uptokenURL;
        } else if(options.uptokenFunc) {
            config.qiniuUploadTokenFunction = options.uptokenFunc;
        }
        if (options.domain) {
            config.qiniuImageURLPrefix = options.domain;
        }
    }
    
    function upload(filePath, success, fail, options, progress, cancelTask) {
        if (null == filePath) {
            console.error('qiniu uploader need filePath to upload');
            return;
        }
        if (options) {
          updateConfigWithOptions(options);
        }
        if (config.qiniuUploadToken) {
            doUpload(filePath, success, fail, options, progress, cancelTask);
        } else if (config.qiniuUploadTokenURL) {
            getQiniuToken(function() {
                doUpload(filePath, success, fail, options, progress, cancelTask);
            });
        } else if (config.qiniuUploadTokenFunction) {
            config.qiniuUploadToken = config.qiniuUploadTokenFunction();
            if (null == config.qiniuUploadToken && config.qiniuUploadToken.length > 0) {
                console.error('qiniu UploadTokenFunction result is null, please check the return value');
                return
            }
            doUpload(filePath, success, fail, options, progress, cancelTask);
        } else {
            console.error('qiniu uploader need one of [uptoken, uptokenURL, uptokenFunc]');
            return;
        }
    }
    
    function doUpload(filePath, success, fail, options, progress, cancelTask) {
        if (null == config.qiniuUploadToken && config.qiniuUploadToken.length > 0) {
            console.error('qiniu UploadToken is null, please check the init config or networking');
            return
        }
        var url = config.region;
        var formData = {
            'token': config.qiniuUploadToken
        };

        var fileName = filePath.split('//')[1];
        var fileSubfix = filePath.substring(filePath.lastIndexOf('.'), filePath.length);
        if (config && config.key) {
            fileName = config.key + fileSubfix;
        }
        formData['key'] = fileName;
        var uploadTask = my.uploadFile({
            url: url,
            filePath: filePath,
            fileType: 'image',
            fileName: 'file',
            formData: formData,
            success: function (res) {
              var dataString = res.data
              if(res.data.hasOwnProperty('type') && res.data.type === 'Buffer'){
                dataString = String.fromCharCode.apply(null, res.data.data)
              }
              try {
                var dataObject = JSON.parse(dataString);
                //do something
                var imageUrl = config.qiniuImageURLPrefix + '/' + dataObject.key;
                dataObject.imageURL = imageUrl;
                console.log(dataObject);
                if (success) {
                  success(dataObject);
                }
              } catch(e) {
                console.log('parse JSON failed, origin String is: ' + dataString)
                if (fail) {
                  fail(e);
                }
              }
            },
            fail: function (error) {
                console.error(error);
                if (fail) {
                    fail(error);
                }
            }
        })
        /*
        uploadTask.onProgressUpdate((res) => {
            progress && progress(res)
        })
    
        cancelTask && cancelTask(() => {
            uploadTask.abort()
        })*/
    }
    
    function getQiniuToken(callback) {
      my.httpRequest({
        url: config.qiniuUploadTokenURL,
        success: function (res) {
          var token = res.data.uptoken;
          if (token && token.length > 0) {
            config.qiniuUploadToken = token;
            config.key = res.data.key;
            config.qiniuImageURLPrefix = res.data.domain;
            config.region = res.data.region;

            if (callback) {
                callback();
            }
          } else {
            console.error('qiniuUploader cannot get your token, please check the uptokenURL or server')
          }
        },
        fail: function (error) {
          console.error('qiniu UploadToken is null, please check the init config or networking: ' + error);
        }
      })
    }
    
    function uploadURLFromRegionCode(code) {
        var uploadURL = null;
        switch(code) {
            case 'ECN': uploadURL = 'https://up.qbox.me'; break;
            case 'NCN': uploadURL = 'https://up-z1.qbox.me'; break;
            case 'SCN': uploadURL = 'https://up-z2.qbox.me'; break;
            case 'NA': uploadURL = 'https://up-na0.qbox.me'; break;
            case 'ASG': uploadURL = 'https://up-as0.qbox.me'; break;
            default: console.error('please make the region is with one of [ECN, SCN, NCN, NA, ASG]');
        }
        return uploadURL;
    }
    
    })();